CN1147857C

CN1147857C - Optic record medium and record/replay device

Info

Publication number: CN1147857C
Application number: CNB001353446A
Authority: CN
Inventors: Ͳ��һ; 筒井敬一; ֮; 福本敦; 新井雅之; 荒谷胜久
Original assignee: Sony Corp
Current assignee: Sony Corp
Priority date: 1999-12-24
Filing date: 2000-12-15
Publication date: 2004-04-28
Anticipated expiration: 2020-12-15
Also published as: US6985428B2; KR20010062660A; CN1302066A; US20050185521A1; US6885628B2; JP2001184801A; US6980508B2; KR100721076B1; US20050163031A1; US20010005535A1

Abstract

A recording and reproduction apparatus using a plurality of generations of optical recording media and an optical recording medium used in such a recording and reproduction apparatus, wherein the optical recording medium comprises first and second recording areas, the first recording area is divided into a plurality of zones, each of the plurality of zones is divided into a plurality of divided areas of one type among a plurality of types set in advance, the plurality of divided areas are assigned addresses and have fixed recording capacities, and identification information indicating the one type is recorded in the second recording area. The apparatus focuses a laser beam on the second recording area to read the identification information and records information on the first recording area or detects recorded information of the first recording area based on the identification information.

Description

The recording method of optical recording media and from the method for optical recording media information reproduction

Technical field

The present invention relates to optical recording medias such as a kind of CD and be used for recording of information/transcriber and the method on optical recording media in recorded information on the optical recording media and detection record.

Recent years, video disc recording density is improved.And, changed the form of the dish of definite recording/reproducing system.

For example, in the magneto-optic disk (MO dish) of the 90mm size with International Organization for Standardization standard, first generation capacity is 128MB, and second generation capacity is 230MB, and third generation capacity is 640MB.In each generation, all improved recording capacity.

Similarly, in the magneto-optic disk of 130mm size, first generation capacity is 650MB, and second generation capacity is 1.3GB, and third generation capacity is 2.0GB.Be again each generation all to have improved recording capacity.

The size that focuses on the bundle spot on the CD is determined that by optical parametric as the light beam wavelength λ of use and the numerical aperture NA of object lens, thereby disk format and optical parametric are closely related.

In the disk format of correlation technique, along with the development optical parametric in each generation also is changed, can use littler bundle spot record and to reproduce littler mark.

And the division methods that has changed modulation and demodulation methods, addressing method and recording areas waits and is suitable for littler mark.For example, along with the development in each generation, recording capacity, modulator approach, demodulation method of address number in zoned format, the subregion, address etc. have been changed.As a result, the recording capacity of CD is along with the development in each generation also has been enhanced.

Be used for third generation disc recording device be based on first and second generation form these variations design, thereby can handle first, second and third generation CD.

But, when summing up the present invention's problem to be solved, generally speaking, can not handle second and third generation CD at the data recording/reproducing device of first generation CD design.This is because in the first generation, is difficult to predict the modulation and demodulation method, addressing method of back several generations CD etc.

Summary of the invention

An object of the present invention is to provide a kind of data recording/reproducing device, can use much for CD.

Another object of the present invention provides a kind of optical recording media that can use in this data recording/reproducing device.

A further object of the present invention provides a kind of method of recording light recording medium.

According to a first aspect of the invention, a kind of method from the optical recording media information reproduction is provided, this optical recording media comprises first record area and second record area, described first record area is divided into a plurality of subregions, each of described a plurality of subregions is divided into a plurality of child partitions of one type, this type is a kind of in N the type that is provided with in advance, N is the integer greater than 1, wherein, the described a plurality of child partitions that are included in each of described a plurality of subregions are assigned the address and have fixing recording capacity, represent described one type identification information recording at described second record area, the method comprising the steps of: read described identification information from described second record area; According to the described identification information that reads, detect the information of described first record area record.

A kind of method from the optical recording media information reproduction also is provided, this optical recording media comprises first record area and second record area, described first record area is divided into a plurality of subregions, each of described a plurality of subregions is divided into fixing a plurality of child partitions, the described a plurality of child partitions that are included in each of described a plurality of subregions have one type recording capacity and are assigned the address, such recording capacity is a kind of in the recording capacity of M type being provided with in advance, M is the integer greater than 1, represent described one type identification information recording at described second record area, the method comprising the steps of: read described identification information from described second record area; According to the described identification information that reads, detect the information of described first record area record.

Preferably, these medium comprise magneto-optic disk, at least one of first and second recording areas comprises a zone, and information is come record by the magnetic field modulation register system in this zone, and the information that is write down utilizes domain wall displacement phenomenon or super-resolution phenomenon to reproduce by playback system.

Preferably, second record area also records in expression recording status and the playback mode status information of at least one.

Perhaps, preferably, these medium comprise CD; First record area is to be positioned at reading in the district and reading zone between the district in the block of information; Second record area comprises and reads in the district and read in the district at least one.

In accordance with a further aspect of the present invention, provide a kind of method of recording light recording medium, comprised following step: optical recording media has been divided into a first record area and a second record area; Described first record area is divided into a plurality of subregions; Each of described a plurality of subregions is divided into a plurality of child partitions of one type, this type is a kind of in N the type that is provided with in advance, N is the integer greater than 1, and each child partition is assigned the address, and the child partition number of each subregion is corresponding with the described type of described child partition; The identification information of the described type of record representative in described second record area.Wherein, described second record area also can record at least one the status information in expression recording status and the playback mode.

According to another aspect of the invention, provide a kind of method of recording light recording medium, comprised following step: optical recording media has been divided into a first record area and a second record area; Described first record area is divided into a plurality of subregions; Each of described a plurality of subregions is divided into a plurality of child partitions of one type, and this type is a kind of in M the type that is provided with in advance, and M is the integer greater than 1, and each child partition is assigned the address, and has and the corresponding recording capacity of described type; The identification information of the described type of record representative in described second record area.Wherein, described second record area also can record at least one the status information in expression recording status and the playback mode.

Promptly in the above methods, because each that is included in a plurality of subregions in the first record area is divided into a plurality of child partitions of one type in N the type, each of these a plurality of child partitions is assigned with the address, and each has fixing recording capacity, so, can improve recording density and/or recording capacity by selecting the type in N the type with bigger child partition.

By the second record area that laser beam is focused on first optical recording media read top one type identification information and based on the identification information recording information of reading in first record area or detect the information that is write down in the first record area, can use have different recording density and/or recording capacity much for optical recording media.

In above-mentioned method, because each that is included in a plurality of subregions in the first record area is divided into the child partition of fixed amount, each of these a plurality of child partitions has one type recording capacity in the recording capacity of M type, and each is assigned with the address, so, can improve recording density and/or recording capacity by selecting the type in M the type with more child partitions.

By the second record area that laser beam is focused on second optical recording media read top one type identification information and based on the identification information recording information of reading in first record area or detect the information that is write down in the first record area, can use have different recording density and/or recording capacity much for optical recording media.

Description of drawings

These and other objects of the present invention and feature become clearer from the description of the preferred embodiment that provides below with reference to accompanying drawing, wherein:

Fig. 1 is the explanation sketch according to the relation of data recording/reproducing device of the present invention and CD;

Fig. 2 is the view that is used to explain the magnetic field modulation register system;

Fig. 3 explains how the magnetic field modulation register system forms the view of record mark on magneto-optic disk;

Fig. 4 A and 4B are the views of explaining the example of the playback system that uses domain wall displacement;

Fig. 5 uses domain wall displacement to come the family curve of two types magneto-optic disk of reproducing signal by magnetic field modulation register system tracer signal and by playback system;

Fig. 6 A is the view of explaining the difference between two types the magneto-optic disk to 6D;

Fig. 7 is the view of explanation according to the structure of the form of CD of the present invention;

Fig. 8 explains the view of determining the tables of data of the address number in the subregion according to type;

Fig. 9 explains the view of tables of data of determining the recording capacity of the child partition corresponding with the address in the subregion according to type;

Figure 10 is the sketch of the structure of block diagram of data recording/reproducing device according to an embodiment of the invention;

Figure 11 is the sketch of structure of light picker of the data recording/reproducing device of Figure 10;

Figure 12 is the view of structure of light receiving part of explaining the fluorescence detector of Figure 11 light picker.

Embodiment

Preferred embodiment is described below with reference to the accompanying drawings.

Fig. 1 is the sketch of explaining according to the relation of data recording/reproducing device of the present invention and CD.

Data recording/reproducing device 190 comprise by focussed laser beam to

CD

81a or 81b and recorded information to optical recording media and detect the optical system of the information that on optical recording media, writes down.

For CD 81b, but Q is a natural number to the Q of data recording/reproducing device 190 types of service 1 here for (Q+1) of CD 81a and type 2.CD 81a and 81b have been enhanced recording capacity with the order of Class1 and type 2.

CD

81a and 81b have substantially the same external form, trade shape and address shape and have can be by servosignal, address signal and the reproducing signal that uses optical system detection to arrive.Can insert

CD

81a and 81b in the pallet, and this pallet is installed in the data recording/reproducing device 190.

Then, the recording capacity of explaining the CD with identical optical parametric as an example improves principle.As a kind of CD, use magneto-optic disk as an example.

The magnetic field modulation register system is a kind of register system, can less than the label record of beam spot size of light beam on the recording layer of magneto-optic disk.

Fig. 2 and 3 is the views that are used to explain the magnetic field modulation register system.

In Fig. 2, object lens 2 and magnetic head 20 are configured to stride magneto-optic disk 81 and face with each other.

In when record, by forming record mark by the magnetic direction that forms the bundle spot of laser beam LB on the recording layer of object lens 2 in magneto-optic disk 81 and change the magnetic line of force of magnetic head 20 generations.

Fig. 3 is how explanation magnetic field modulation register system forms record mark on magneto-optic disk 81 a view.

The recording layer of magneto-optic disk 81 has the guiding GD of track Tr and track Tr to form.The bundle spot BS of laser beam LB is focused on the recording layer.The center of bundle spot is positioned in the center of track Tr.For example, track Tr can make groove, and guiding GD can make spine.Perhaps track Tr makes spine, and guiding GD makes groove.

The high-temperature part HT of bundle spot BS is a zone that surpasses the Curie temperature of recording layer.In high-temperature part HT outside, temperature becomes and is lower than Curie temperature.High-temperature part HT is by the external magnetic field magnetization from magnetic head 20.Record mark MK becomes herringbone shape or the crescent-shaped corresponding to the thermograde of the high-temperature part HT formation of bundle spot BS.

Therefore, as illustrated by changing the external magnetic field, can on orbital direction, form record mark MK continuously less than bundle spot BS.

By this way,, need not to make bundle spot BS littler, just can carry out more highdensity record by using the magnetic field modulation register system.

Then, explain and need not to make the littler example that just can reproduce of bundle spot BS with the playback system of the information of high density recording.

Japanese unexamined patent (disclosing) number 6-290496 discloses a kind of such magneto-optic reproducting method.

According to this magneto-optic reproducting method, magneto-optic disk comprises at least one three layers of magnetic film, comprises displacement layer, conversion layer and accumulation layer.When reproducing signal, use the domain wall displacement of displacement layer in the zone of the Curie temperature by being equal to or higher than conversion layer in magnetospheric temperature, the size of the magnetic domain of record is significantly enlarged, and has increased the reproduction carrier signal.

This uses the playback system of domain wall displacement to be called as domain wall displacement and detects (DWDD).The explanation reference Fig. 4 A and the 4B of this playback system.

Fig. 4 A is the view that how laser beam LB is focused on displacement layer 81T, conversion layer 81S and the accumulation layer 81M.Three layers of magnetic film that attention is made of displacement layer 81T, conversion layer 81S and accumulation layer 81M are corresponding to a recording layer.

Accumulation layer 81M comes tracer signal (or information) according to the length with magnetic domain 81Y of spin polarization SP (direction of magnetization).Interface between the adjacent magnetic domain 81Y is domain wall 81W.

During signal reproduction, when recording layer is heated partly by laser beam LB, form the thermograde shown in Fig. 4 b.

In conversion layer 81S, demagnetized and be cut off mutual coupling with accumulation layer 81M in the zone that temperature is higher than the Curie temperature of conversion layer 81S.And, only have among the displacement layer 81T little domain wall magnetostrictive force domain wall 81W be displaced to high temperature side.

When the domain wall 81W that forms at regular intervals according to the signal that is recorded among the accumulation layer 81M arrives the isotherm of Curie temperature along with the rotation of magneto-optic disk 81 at every turn, domain wall displacement taking place and detect the spin polarization SP of the magnetic domain 81Y that is enlarged by domain wall displacement at displacement layer 81T, thereby can detect tracer signal.

The advantage of DWDD system is to take out large-signal from the tiny record magnetic domain 81Y with cycle littler than the optical resolution limit of laser beam LB, thereby can be detected and need not change optical parametric with the information of high density recording, as the wavelength X of laser beam and the numerical aperture NA of object lens.

In magneto-optic-playback system,, have a kind of by the outside system (magnetic is amplified magneto-optic system, so-called MAMMOS) of reproducing magnetic field expansion record magnetic domain as the system that uses above-mentioned magnetic domain enlargement phenomenon.

In addition, a kind of super-resolution system that uses bundle spot height of center isothermal segment (" central aperture detection " of so-called magnetic induction ultrahigh resolution (MSR) (CAD)) is arranged.These can reach high density and not change optical parametric, from but a kind of system that is hopeful further to improve recording density.

Fig. 5 is by magnetic field modulation register system tracer signal and comes the family curve of two types magneto-optic disk of reproducing signal by the DWDD system.Here, will explain that as an example magneto-

optic disk

81a and 81b are magneto-optic disks and have the situation of illustrated family curve Ka and Kb.

Among Fig. 5, transverse axis is represented linear recording density, the power margin of longitudinal axis representative laser beam when record and reproduction.

Linear recording density represents to guarantee the limiting density of the error rate of being scheduled to.Track space is identical, and the variation of recording density forms by the recording density that changes on the orbital direction.

On the other hand, the power margin representative can be carried out the fluctuation range of the laser power of normal recordings and reproduction.Power margin is big more, and is big more to the resistibility of temperature variation and timeliness, just more may handle the manufacturing variation in magneto-optic disk and the data recording/reproducing device.

The dispersion of the bundle spot that power margin also tilts to cause owing to poor focusing and laser beam increases, and the degree of admission of this fluctuation is had holding capacity.

In the curve of Fig. 5, the family curve Ka of magneto-

optic disk

81a and 81b and Kb represent that recording density is high more, and power margin is more little.And under identical power margin, magneto-optic disk 81b can provide the recording density higher than magneto-optic disk 81a.

In data recording/reproducing device 190, to guarantee the certain power tolerance limit usually.For example, when having required power margin P, recording density B becomes the ultimate value among the magneto-optic disk 81b, and recording density A becomes the ultimate value among the magneto-optic disk 81a.

Fig. 6 A is the view that is used to explain the difference between magneto-optic disk 81a and the 81b to 6D.

Fig. 6 A is the enlarged drawing that is used to explain the track of magneto-optic disk 81b, and Fig. 6 B is the enlarged drawing that is used to explain magneto-optic disk 81b.

Fig. 6 C is the enlarged drawing that is used to explain the track of magneto-optic disk 81a, and Fig. 6 D is the enlarged drawing that is used to explain magneto-optic disk 81a.

In magneto-optic disk 81a shown in the 6D and 81b, on dish substrate 81P, form recording layer 81Q at Fig. 6 A.Spine and groove form by the topological structure of recording layer 81Q.Groove is corresponding to track Tr, and spine is corresponding to guiding GD0 and GD1.

Magneto-optic disk 81b shown in Fig. 6 A and 6B forms the regional 81R cut off by the recording layer that short wavelength, high-power laser beam irradiation is converted to guiding GD1 to it and blows the track junction place of magneto-optic disk 81a on the guiding GD0 at the track junction place of the magneto-optic disk 81a shown in Fig. 6 C and the 6D and forms.By adopting this structure, the magnetic connection between the adjacent orbit is cut off, and domain wall displacement becomes smoothly, thereby can stably reproduce tiny mark (or signal).

Notice that magneto-optic disk 81b is higher than magneto-optic disk 81a on cost, because will blow spine by high-power laser beam.

As the another kind of method that is used to improve recording density, it is to come its annealing with the UV-irradiation track before tracer signal that a kind of method is arranged.Annealing can make domain wall displacement level and smooth.The cost of noting this method is also than the cost height of unannealed magneto-optic disk, because will be annealed by ultraviolet light.

Consider the balance of cost and recording density, preferably can at least two types magneto-optic disk be write down and reproduce.In the present embodiment, as illustrated, the form of magneto-optic disk is defined in below the recording density raising of expectation.

Fig. 7 is the topology view of explaining according to the form of CD of the present invention.With the example of magneto-optic disk 81 as CD, this will provide describes top magneto-optic disk 81a and the explanation of 81b.

Magneto-optic disk 81 is formed with center pit 83, and clamp area 84 is used to magneto-optic disk 81 is fixed on the turntable of data recording/reproducing device 190.

Magneto-optic disk 81 comprises block of information 88.Block of information 88 is formed by first and second recording areas.

First record area be positioned in read in the district 85 and read the district 86 between, be divided into a plurality of subregions 82, write down various information.

As an example, each of these a plurality of subregions 82 is split into a plurality of child partitions of one type in the predetermined N type (N is the integer greater than 1).And be included in these a plurality of child partitions in each subregion each be assigned with the address, also have fixing recording capacity.

Attention is in Fig. 7,12 explanation diagrammatic sketch, and the address area 87 that is positioned in the most inboard subregion illustrates as an example, and omit the address area in other subregion.

Second record area comprises that reading on the inner circumferential side reading district 86 on district 85 and the outer circumferential sides, the identification information of this type of record expression, and the information of record expression and the difference of the recording density of first record area.

Be installed on magneto-optic disk 81 on the turntable of data recording/reproducing device 190 according to the zone of focused beam acts spot BS or subregion 82 with predetermined rotational speed rotation (for example constant linear velocity).

The address signal of address area 87 is made of the topological mark that is called " load mould ".The record of signal is provided with according to the address with the reproduction position.Attention also can be made the sector corresponding to the child partition of address area 87.

In magneto-optic disk 81, the difference of recording density is determined by the identification information of type.The recording capacity of subregion 82 changes according to identification information.

First method that changes the recording capacity of subregion 82 is to make the recording capacity of child partition (for example sector) constant, and determines address number in the subregion according to type.

Fig. 8 is first method and a kind of key drawing of determining the tables of data of address number in the subregion by type.The subregion that is positioned at inside circumference is designated as subregion no.1, and outside therefrom subregion is designated as subregion no.2, subregion no.3 etc.Sevtor address number on the radial position of each subregion and each track (one week of track) is determined by type.

Subregion no.1 is positioned in the radius of 22.6mm to 25.4mm, has 4000 tracks, has on each track: Class1,20 addresses; 2,25 addresses of type.

Subregion no.2 is positioned in the radius of 25.4mm to 28.2mm, has 4000 tracks, has on each track: Class1,22 addresses; 2,27 addresses of type.

Subregion no.3 is positioned in the radius of 28.2mm to 31.0mm, has 4000 tracks, has on each track: Class1,24 addresses; 2,30 addresses of type.

By this way by type 1 and the order of type 2 can improve recording density.

Second method that changes the recording capacity of subregion 82 is to make that address number in the subregion is constant determines recording capacity (recording capacity of each address) corresponding to the child partition of address according to type then.

Fig. 9 represents second method and determines key drawing corresponding to the tables of data of the recording capacity of the child partition of the address in the subregion.The subregion that is positioned at inside circumference is designated as subregion no.1, and outside therefrom subregion is designated as subregion no.2, subregion no.3 etc.Sevtor address number on the radial position of each subregion and each track is determined by type.

Subregion no.1 is positioned in the radius of 22.6mm to 25.4mm, has 4000 tracks, and 25 addresses are arranged on each track, and the recording capacity of each address of Class1 is 4KB, and type 2 is 5KB.

Subregion no.2 is positioned in the radius of 25.4mm to 28.2mm, has 4000 tracks, and 27 addresses are arranged on each track, and the recording capacity of each address of Class1 is 4KB, and type 2 is 5KB.

Subregion no.3 is positioned in the radius of 28.2mm to 31.0mm, has 4000 tracks, and 29 addresses are arranged on each track, and the recording capacity of each address of Class1 is 4KB, and type 2 is 5KB.

Class1 and type 2 can improve recording density in order by this way.

The data recording/reproducing device 190 that is used for above-mentioned record format at first detected before record and reproducing signal and reads in the district or read the identification information in district.When record and reproduction, its obtains the position of target partition with reference to the sevtor address that top tables of data visit needs according to detected type, and reads the address signal of load mould.

And, data recording/reproducing device 190 can be in the internal storage of control circuit storing predetermined tables of data, for reference when needed.

For guaranteeing the interchangeability of dissimilar magneto-optic disk 81 (magneto-

optic disk

81a and 81b), represent the recording status of magneto-optic disk 81 and/or the status information of playback mode can be recorded in the second record area of magneto-optic disk 81.Recording status for example is the dutycycle of laser power, laser beam LB, the intensity of recording magnetic field etc.

In magneto-optic disk 81, by using the playback system of magnetic field modulation register system and use magnetic domain enlargement phenomenon or super-resolution phenomenon, recording density can be enhanced and need not change optical parametric.In addition, be used for to handle the magneto-optic disk of recording density with raising when the data recording/reproducing device of the magneto-optic disk of former generation.

Figure 10 is the sketch of the structure of data recording/reproducing device according to an embodiment of the invention.

Data recording/reproducing device 190 comes read-out mark information and status information with the second record area that laser beam LB focuses on magneto-optic disk 81, according to the status information of reading laser beam LB is focused on first record area with in the first record area recorded information, perhaps according to the status information focussed laser beam at first record area to detect information at the first record area record.

Data recording/reproducing device 190 comprises modulation circuit 10, magnetic head 20, magnetic head drive circuit 25, motor 30, motor drive circuit 35, phase compensating circuit 40, amplifying circuit 42, light picker 150, amplifying circuit (head amplifier) 152, laser drive circuit 155, produces circuit 160, information detection 165, control circuit 170 and recoding/reproduction change-over circuit 175.

Data recording/reproducing device 190 recorded information or from the information of rotation magneto-optic disk 81 detection record on rotation magneto-optic disk 81.

Control circuit 170 is to be used for a controller of controlling recording/transcriber 190 on the whole, for example is made of microcomputer.

Control circuit 170 control motor drive circuits 35, laser drive circuit 155, light picker 150, phase compensating circuit 40, generation circuit 160, information detection 165, magnetic head drive circuit 25, modulation circuit 10 etc.Control circuit 170 also comprises internal storage, the tables of data in the storage map 8 and 9.

Light picker 150 focuses on laser beam LB the record position of magneto-optic disk 81 when record, and laser beam LB is focused on the reproduction position of magneto-optic disk 81 when reproducing.The power of noting laser beam LB when record when reproducing.

The input signal Si n of the information that modulation circuit 10 reception representatives will be recorded when record produces output signal S10 with modulating input signal Sin such as 8-14 modulation (EFM) methods, and provides this output signal S10 to magnetic head drive circuit 25 as input.

Magnetic head drive circuit 25 offers magnetic head 20 to the exciting current S25 that drives usefulness based on the output signal S10 of modulation circuit 10.

Magnetic head 20 is encouraged by the exciting current S25 from magnetic head drive circuit 25 at its magnetic core, produces magnetic line of force MB according to the input signal Si n from magnetic core, and magnetic field is put on the part of the magneto-optic disk 81 of focused beam according to input signal Si n.

Motor 30 for example comprises Spindle Motor and rotates magneto-optic disk 81 with predetermined rotational speed.Motor 30 rotation magneto-optic disks 81 make that for example linear velocity is constant.

Motor drive circuit 35 comes CD-ROM drive motor 30 by drive current is provided to motor 30.Motor drive circuit 35 can be controlled the rotation of motor 30 by pulse-length modulation (PWM) or phaselocked loop (PLL).

Laser drive circuit 155 produces drive signal SL under the control of control circuit 170, by the semiconductor laser in the drive signal SL driving light picker, and cause that laser beam LB exports from semiconductor laser.

Light picker 150 provide laser beam LB to magneto-optic disk 81 track and focus it on the record position of magneto-optic disk 81 or reproduce the position.

When record, the focal position of magneto-optic disk 81 becomes the high temperature of the Curie temperature that exceeds recording layer, the magnetic field magnetisation that focusing block is applied by magnetic head 20, thereby write input Sin.

Amplifying circuit (head amplifier) 152 amplifies the output signal SA of the fluorescence detector in the light pickers 150 to SF, and they are offered generation circuit 160.

Based on from the output signal SA of the fluorescence detector of amplifying circuit 152 to SF, produce the reproducing signal RF that circuit 160 produces corresponding to the light quantity (reflection light quantity) of laser light reflected bundle, produce reproducing signal MO based on magneto-optical signal, focus error signal FE and tracking error signal TE.

40 couples of focus error signal FE of phase compensating circuit and tracking error signal TE compensate (phase compensation and/or frequency compensation) and produce the signal after the compensation and the signal after the compensation offered amplifying circuit 42.

Amplifying circuit 42 amplifies signal after the compensation of focus error signal FE to produce drive signal Sfe and to provide it to focus driver in the light picker 150.

And amplifying circuit 42 amplifies signal after the compensation of tracking error signal TE producing drive signal Ste, and provides it to the tracking driver in the light picker 150.

Information detection 165 receives reproducing signal MO from circuit 160 takes place, and demodulation reproducing signal MO detects the recorded information of magneto-optic disk 81 and exports detected tracer signal, as output signal So.

175 generations of recoding/reproduction change-over circuit are used for the switching signal of changing and provide this switching signal to control circuit 170, information detection 165, modulation circuit 10, magnetic head drive circuit 25 etc. between the record of data recording/reproducing device 190 and reproduction.

When the switching signal of representative reproduction was provided, modulation circuit 10 stopped to provide output signal S10 to magnetic head drive circuit 25.And when the switching signal of representative reproduction was provided, magnetic head drive circuit 25 stopped to provide exciting current S25 to magnetic head 20.

On the other hand, when the switching signal of representative record was provided, information detection 165 stopped to produce output signal So.

Control circuit 170 is according to the laser output power of switching signal control light picker 150, or detects identification information and the status information size with the magnetic line of force MB that produces based on status information control laser output power and/or dutycycle and control head 20 from reproducing signal RF.

And, control circuit 170 detects the address from reproducing signal RF, come controlling recording/transcriber 190 with recorded information based on detected address, identification information and tables of data recorded information, come the information of detection record based on detected address, identification information and tables of data.

Figure 11 is the sketch that is included in the structure of the light picker 150 in the data recording/reproducing device 190.

Light picker 150 comprises semiconductor laser 4, collimation lens 5, beam splitter 3, object lens 2, convergent lens 6, lens pillar 7, fluorescence detector 18, object lens clamper 2H, focus actuator 2F, follows the tracks of actuator 2T and Wollaston prism 15.

Object lens 2 are by object lens clamper 2H clamping.

Focus actuator 2F based on drive signal Sfe on perpendicular to the direction of the recording surface of magneto-optic disk 81 mobile object lens clamper 2H with mobile object lens 2 on focus direction.

Follow the tracks of actuator 2T and make progress mobile object lens clamper in the footpath of magneto-optic disk 81 with the mobile object lens 2 that make progress of the footpath at magneto-optic disk 81 based on drive signal Ste.

Semiconductor laser 4 output line polarized laser beam also provide it to collimation lens 5 based on drive signal SL.

Collimation lens 5 is converted to the laser beam from semiconductor laser 4 directional light and it is provided to beam splitter 3.

The laser beam that beam splitter 3 transmissions come self-focus lens 5 offers object lens 2 to it.

Object lens 2 focus on from the laser beam of beam splitter 3 and its track to the magneto-optic disk 81 with spine and/or chase are provided.

And object lens 2 return beam splitter 3 to laser light reflected bundle on magneto-optic disk 81.

Beam splitter 3 reflects the concurrent beam of injecting by the laser beam irradiation from object lens 2, and incoming beam is offered Wollaston prism 15.

Wollaston prism 15 is divided into main beam and first and second side beam to the laser beam from beam splitter 3, and they are offered convergent lens 6.

Convergent lens 6 is assembled from the laser beam of Wollaston prism 15 and is provided it to lens pillar 7.

Lens pillar 7 transmissions are from the laser beam of convergent lens 6 and provide it to fluorescence detector 18.

Fluorescence detector 18 receives from the laser beam of lens pillar 7 and produces output signal SA to SF at light receiving part.

Figure 12 is the synoptic diagram of structure of the light receiving part of fluorescence detector 18.The light receiving part of fluorescence detector 18 comprises main beam receiving unit 18S, the first side beam receiving unit 18E and the second side beam receiving unit 18F.

Main beam receiving unit 18S provides main beam from Wollaston prism 15 through convergent lens and lens pillar 7.Main beam receiving unit 18S is split into 4 parts by two cut-off rule 18Sx and 18Sy, thereby 4 cut zone 18A is arranged to 18D.Form bundle spot MS at the light beam receiving unit 18S of Figure 12 by the main beam of lens pillar 7.

The cut-off rule 18Sx of the axis of symmetry of lens pillar 7 and main beam receiving unit 18S or the direction of 18Sy form the angle of about 45 degree or 135 degree.

The point of crossing of cut-off rule 18Sx and 18Sy is positioned in by the center of the main beam of lens pillar 7 or approximate centre.

The bundle spot MS shape that is formed on the main beam receiving unit 18S changes on diagonal according to the distance between magneto-optic disk 81 and the object lens 2, thereby can detect relatively poor focusing on magneto-optic disk 81 based on the output signal SA that is produced to 18D by each cut zone 18A to SD by astigmatic method.Tracking error can be detected by push-pull method etc.

The first side beam receiving unit 18E provides first side beam that is separated by Wollaston prism 15 and produces output signal SE through convergent lens 6 and lens pillar 7.First side beam by lens pillar 7 on the first side beam receiving unit 18E of Figure 12 forms bundle spot SSE.

The second side beam receiving unit 18F provides second side beam that is separated by Wollaston prism 15 and produces output signal SF through convergent lens 6 and lens pillar 7.Second side beam by lens pillar 7 on the second side beam receiving unit 18F of Figure 12 forms bundle spot SSF.

Generation circuit 160 in data recording/reproducing device 190 for example, produces reproducing signal MO based on above-mentioned from the output signal SE of amplifying circuit 152 and poor (SE-SF) of SF, as magneto-optical signal.And, producing circuit 160 uses the above-mentioned output signal SA from amplifying circuit 152 to produce focus error signal FE to SD based on (SA+SC-SB-SD), and, produce reproducing signal RF according to light quantity (light quantity of reflection) based on (SA+SD+SB+SC) based on (SA+SD-SB-SC) generation tracking error signal TE.

Attention the above embodiments are only described as example of the present invention, and the present invention is not restricted to the foregoing description.

Sum up effect of the present invention, in superincumbent first optical recording media, each that is included in these a plurality of subregions in the first record area is divided into a plurality of child partitions of one type in N the type, each of these a plurality of child partitions is assigned with the address, and each has fixing recording capacity, thereby can improve recording density and/or recording capacity by selecting the type with bigger child partition in N the type.

In first data recording/reproducing device, by the second record area that laser beam is focused on first optical recording media read top one type identification information and based on the identification information recording information of reading in first record area or detect the information that is write down in the first record area, just can use have different recording density and/or recording capacity much for optical recording media.

In the second above-mentioned optical recording media, each that is included in these a plurality of subregions in the first record area is divided into the child partition of fixed amount, each of these a plurality of child partitions has one type recording capacity in the recording capacity of M type, and each is assigned with the address, therefore, can improve recording density and/or recording capacity by selecting the type in M the type with more child partitions.

In second data recording/reproducing device, by the second record area that laser beam is focused on first optical recording media read top one type identification information and based on the identification information recording information of reading in first record area or detect the information that is write down in the first record area, just can use have different recording density and/or recording capacity much for optical recording media.

Claims

1. the method for a recording light recording medium comprises following step:

Optical recording media is divided into a first record area and a second record area;

Described first record area is divided into a plurality of subregions;

Each of described a plurality of subregions is divided into a plurality of child partitions of one type, this type is a kind of in N the type that is provided with in advance, N is the integer greater than 1, and each child partition is assigned the address, and the child partition number of each subregion is corresponding with the described type of described child partition;

The identification information of the described type of record representative in described second record area.

2. according to the method for the recording light recording medium of claim 1, wherein said second record area also records at least one the status information in expression recording status and the playback mode.

3. the method for a recording light recording medium comprises following step:

Described first record area is divided into a plurality of subregions;

Each of described a plurality of subregions is divided into a plurality of child partitions of one type, and this type is a kind of in M the type that is provided with in advance, and M is the integer greater than 1, and each child partition is assigned the address, and has and the corresponding recording capacity of described type;

4. according to the method for the recording light recording medium of claim 3, wherein said second record area also records at least one the status information in expression recording status and the playback mode.

5. method from the optical recording media information reproduction, this optical recording media comprises first record area and second record area, described first record area is divided into a plurality of subregions, each of described a plurality of subregions is divided into a plurality of child partitions of one type, this type is a kind of in N the type that is provided with in advance, N is the integer greater than 1, wherein, the described a plurality of child partitions that are included in each of described a plurality of subregions are assigned the address and have fixing recording capacity, represent described one type identification information recording at described second record area, the method comprising the steps of:

Read described identification information from described second record area;

According to the described identification information that reads, detect the information of described first record area record.

6. according to the method from the optical recording media information reproduction of claim 5, wherein: described second record area also records at least a status information in expression recording status and the playback mode,

The step that reads described identification information from described second record area also comprises: read described identification information and described status information;

Detect the step of the information of described first record area record, according to identification information that is read and described status information.

7. method from the optical recording media information reproduction, this optical recording media comprises first record area and second record area, described first record area is divided into a plurality of subregions, each of described a plurality of subregions is divided into fixing a plurality of child partitions, the described a plurality of child partitions that are included in each of described a plurality of subregions have one type recording capacity and are assigned the address, such recording capacity is a kind of in the recording capacity of M type being provided with in advance, M is the integer greater than 1, represent described one type identification information recording at described second record area, the method comprising the steps of:

Read described identification information from described second record area;

8. according to the method from the optical recording media information reproduction of claim 7, wherein: described second record area also records at least a status information in expression recording status and the playback mode,

The step that reads described identification information from described second record area comprises: read described identification information and described status information;